From: msi77 <msi77@yandex.ru>
To: Michele Petrazzo - Unipex <michele.petrazzo@unipex.it>
Cc: pgsql-sql@postgresql.org
Subject: Re: inner join and limit
Date: Sun, 06 Jun 2010 18:58:35 +0400
Message-ID: <307921275836315@web135.yandex.ru> (raw)
In-Reply-To: <4BFD5BC0.90900@unipex.it>
References: <4BFD5BC0.90900@unipex.it>
Hi,
Some ways to do that:
http://www.sql-ex.ru/help/select16.php> Hi list,
> I have two table that are so represented:
> t1:
> id int primary key
> ... other
> t2:
> id int primary key
> t1id int fk(t1.id)
> somedate date
> ... other
> data t1:
> 1 | abcde
> 2 | fghi
> data t2:
> 1 | 1 | 2010-05-23
> 2 | 1 | 2010-05-24
> 3 | 1 | 2010-05-25
> 4 | 2 | 2010-05-22
> 5 | 2 | 2010-05-26
> I'm trying to create a query where the data replied are:
> join t1 with t2 and return only the LIMIT 1 (or N) of the t2, with date
> order (of t2).
> Data should be:
> t1.id | t2.id | t2,somedate
> 1 | 3 | 2010-05-25
> 2 | 5 | 2010-05-26
> As said, I'm trying, but without success...
> Can be done for you?
> Thanks,
> Michele
>
Здесь спама нет http://mail.yandex.ru/nospam/sign
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-sql@postgresql.org
Cc: msi77@yandex.ru, michele.petrazzo@unipex.it
Subject: Re: inner join and limit
In-Reply-To: <307921275836315@web135.yandex.ru>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox